> For the complete documentation index, see [llms.txt](https://tester-bszelag.gitbook.io/software-testing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tester-bszelag.gitbook.io/software-testing/master.md).

# About a book

## 1. Version control (Git)

{% content-ref url="/pages/-MDOAlSn7urWTcGE-9ZH" %}
[Git](/software-testing/git.md)
{% endcontent-ref %}

## 2. Linux OS (Ubuntu)

{% content-ref url="/pages/-MENCdjVjCwvMpNkfepU" %}
[Ubuntu](/software-testing/ubuntu.md)
{% endcontent-ref %}

## 3. Database (PostgreSQL)

{% content-ref url="/pages/-MEXVq23xo1LW2kAz\_6h" %}
[PostgreSQL](/software-testing/postgresql.md)
{% endcontent-ref %}

## 4. Information about Web service

{% content-ref url="/pages/-MEbnoeJKZRGl0pil6G1" %}
[API and Web Service](/software-testing/api-and-web-service.md)
{% endcontent-ref %}